GitHub Advisoryadvisory · Maven

GHSA-qqpg-mvqg-649v Logback allows an attacker to instantiate classes already present on the class path

LOW Published 2026-01-22 Modified 2026-01-22 Official page ↗
Aliases
CVE-2026-1225
Ecosystem
Maven
Packages
ch.qos.logback:logback-core
Severity
Low
CVSS vector
CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L
Weaknesses
CWE-20
Reviewed
2026-01-22

Affected packages

• Maven ch.qos.logback:logback-core: < 1.5.25 → fixed in 1.5.25

Description

ACE vulnerability in configuration file processing by QOS.CH logback-core up to and including version 1.5.24 in Java applications, allows an attacker to instantiate classes already present on the class path by compromising an existing logback configuration file. The instantiation of a potentially malicious Java class requires that said class is present on the user's class-path. In addition, the attacker must have write access to a configuration file. However, after successful instantiation, the instance is very likely to be discarded with no further ado.

Related

Alias · CVE (1)

  • CVE-2026-1225 ACE vulnerability in configuration file processing by QOS.CH logback-core up to and including version 1.5.24 in Java applications, allows… vulnerability

Weakness · CWE (1)

  • CWE-20 Improper Input Validation weakness

References